Version tracking of disk write operations
First Claim
1. A method of storing data on a disc in a disc drive, the method comprising:
- receiving data to be written to the disc during a write operation;
generating, on the disc drive, a write operation sequence indicator uniquely identifying the write operation as against all other write operations performed on the disc;
combining the write operation sequence indicator with the data to obtain a complex data sequence; and
writing the complex data sequence to the disc.
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Accused Products
Abstract
The present invention is a disc drive storage unit incorporating novel apparatus, data structure and method for uniquely identifying data written during each write command operation of the disc drive storage unit. The disc drive storage unit attaches unique write identification data (sequence data, time data, or both) to host computer data written during each sector write operation. The unique write identification data is attached through independent action of the disc drive storage unit. The unique write identification data is attached to the host computer data in such a way that the unique write identification data is transparent to the host computer. The data structure relates the host computer data to the unique write identification data. The method documents the manner in which unique identification data is attached to, and detached from, the host computer data.
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Citations
19 Claims
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1. A method of storing data on a disc in a disc drive, the method comprising:
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receiving data to be written to the disc during a write operation;
generating, on the disc drive, a write operation sequence indicator uniquely identifying the write operation as against all other write operations performed on the disc;
combining the write operation sequence indicator with the data to obtain a complex data sequence; and
writing the complex data sequence to the disc. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer-readable medium having stored thereon a data structure, comprising:
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a first field including data representing a prologue;
a second field including data representing user data;
a third field including data representing an epilogue containing epilogue data; and
a write operation sequence indicator located in one of the prologue and epilogue. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A disc drive storage unit comprising:
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means for generating a write operation sequence identifier;
a storage disc; and
means for writing user data and the write operation sequence identifier to the disc. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification